I have the wiring harness about 1/2 installed. So far so good. It's doing everything I want. I love where the fuse block ended up.. so much easier to access than if it was in the glove box. I bought on of the Painless Wiring specific Relay modules that clips right to this fuse block, and run it off of the "Coil" circuit for the Fuel Pump. So, the Edelbrock ProFlo4 sends the signal to the relay, that then provides relayed 15A fused power to my fuel pump. That said.. the engine bay wires, and tail wires are all wrapped and run to their rough areas. Under-the dash is far from done still too.
So.. cliff notes.. it's working out perfectly. but.. I'm far from done.
Oh yeah. and I did actually add a separate ciruit though. Only because I ended up putting in BMW E92 Electric seats.. so .. I needed a dedicated circuit for them. The 10A accessory cirtuit I think is too low for these seats. So.. I just added a dedicated accessory BUSS bar (one of those multi post models from Amazon), And it's own 30A fuse, and tapped into one of the expansion ports on the fuse block. If I didn't add these electric seats, I'm convinced that the number of circuits I have would have been perfect.